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-2x^2+8x+192=0
a = -2; b = 8; c = +192;
Δ = b2-4ac
Δ = 82-4·(-2)·192
Δ = 1600
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{1600}=40$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(8)-40}{2*-2}=\frac{-48}{-4} =+12 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(8)+40}{2*-2}=\frac{32}{-4} =-8 $
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